| ZIP Codes: | 4 ZIP Codes (2 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 217 / 447 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:03 PM |
| Population: | 4,569 [See All] |
| FIPS: | 17171 |
| CBSA: | Jacksonville, IL |
| Land Area: | 203 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 39.6137, -90.4290 |
| Quick Link: |
4,569 residents live across 4 ZIPs covering 203 sq mi, served by 4 distinct USPS-recognized cities.
Population moved from 4,808 to 4,569 from 2014 to 2024 — a -5.0% change. 1 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 62621 (Bluffs, $82,500 median) and poorest ZIP 62694 (Winchester, $58,460) are 8.8 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.4× across this county — from $73,000 in 62610 (Alsey) to $102,200 in 62694 (Winchester).
Density varies 1446× across the county — from 19 people/sq mi in 62694 (Winchester) to 27,738 in 62610 (Alsey).
Educational attainment ranges from 13.4% bachelor's+ in 62610 (Alsey) to 23.8% in 62694 (Winchester) — the breadth of educational profiles across the area.
Within Illinois, this is the #99 most populous of 102 counties and ranks #53 for median household income .
Weighted by population, the typical household earns about $65,541 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.9% of adults age 25+ hold a bachelor's degree or higher (724 of 3,310 reporting).
2 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.